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<hr><h1>mrm_level_detail.h</h1><a href="mrm__level__detail_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00007 <font class="comment">/* Copyright, 2000-2002 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025
00026 <font class="preprocessor">#ifndef NL_MRM_LEVEL_DETAIL_H</font>
00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_MRM_LEVEL_DETAIL_H</font>
00028 <font class="preprocessor"></font>
00029 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="common_8h.html">nel/misc/common.h</a>"</font>
00031
00032
00033 <font class="keyword">namespace </font>NL3D
00034 {
00035
00036
00037 <font class="comment">// ***************************************************************************</font>
00038 <font class="comment">/* This is used to have correct max Polygon count setuped. This suppose that MRM.NumLod==10</font>
00039 <font class="comment"> Hence, a mean value of 0.5*1/10 is used</font>
00040 <font class="comment">*/</font>
<a name="l00041"></a><a class="code" href="mrm__level__detail_8h.html#a0">00041</a> <font class="preprocessor">#define NL3D_MRM_LD_SHIFT_POLY_COUNT 0.05f</font>
00042 <font class="preprocessor"></font>
00043
00044 <font class="comment">// ***************************************************************************</font>
<a name="l00051"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html">00051</a> <font class="comment"></font><font class="keyword">class </font>CMRMLevelDetail
00052 {
00053 <font class="keyword">public</font>:
00054
<a name="l00056"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">00056</a> uint32 <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">MinFaceUsed</a>;
<a name="l00058"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m1">00058</a> uint32 <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m1">MaxFaceUsed</a>;
00059
<a name="l00061"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m2">00061</a> <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m2">DistanceFinest</a>;
<a name="l00063"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m3">00063</a> <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m3">DistanceMiddle</a>;
<a name="l00065"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m4">00065</a> <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m4">DistanceCoarsest</a>;
00066
<a name="l00068"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m5">00068</a> <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m5">OODistanceDelta</a>;
<a name="l00069"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m6">00069</a> <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m6">DistancePow</a>;
00070
00071 <font class="keyword">public</font>:
<a name="l00073"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a0">00073</a> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a0">CMRMLevelDetail</a>() {}
00074
00076 <font class="keywordtype">void</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a1">compileDistanceSetup</a>();
00077
00079 <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a2">getLevelDetailFromDist</a>(<font class="keywordtype">float</font> dist);
00080
<a name="l00082"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a3">00082</a> <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a3">getNumTriangles</a> (<font class="keywordtype">float</font> dist)
00083 {
00084 <font class="comment">// return the lod detail [0,1].</font>
00085 <font class="keywordtype">float</font> ld= <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a2">getLevelDetailFromDist</a>(dist);
00086 <font class="comment">// return in nb face.</font>
00087 <font class="keywordflow">if</font>(ld<=0)
00088 <font class="keywordflow">return</font> (float)<a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">MinFaceUsed</a>;
00089 <font class="keywordflow">else</font>
00090 {
00091 <font class="comment">/* over-estimate the number of poly rendered </font>
00092 <font class="comment"> because this is always the higher Lod which is rendered, geomorphing to the coarser one.</font>
00093 <font class="comment"> NB: still need to over-estimate if ld==1, because getLevelDetailFromPolyCount() remove the shift...</font>
00094 <font class="comment"> */</font>
00095 ld+= <a class="code" href="mrm__level__detail_8h.html#a0">NL3D_MRM_LD_SHIFT_POLY_COUNT</a>;
00096 <font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">MinFaceUsed</a> + ld * (<a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m1">MaxFaceUsed</a> - <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">MinFaceUsed</a>);
00097 }
00098 }
00099
<a name="l00101"></a><a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a4">00101</a> <font class="keywordtype">float</font> <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#a4">getLevelDetailFromPolyCount</a>(<font class="keywordtype">float</font> polygonCount)
00102 {
00103 <font class="keywordtype">float</font> ld;
00104 <font class="keywordflow">if</font>(<a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m1">MaxFaceUsed</a> > <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">MinFaceUsed</a>)
00105 {
00106 <font class="comment">// compute the level of detail we want.</font>
00107 ld= (polygonCount - <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">MinFaceUsed</a>) / (<a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m1">MaxFaceUsed</a> - <a class="code" href="classNL3D_1_1CMRMLevelDetail.html#m0">MinFaceUsed</a>);
00108 <font class="comment">/* remove the value added in getNumTriangles(). For the same reason:</font>
00109 <font class="comment"> this is always the higher Lod which is rendered, geomorphing to the coarser one.</font>
00110 <font class="comment"> Hence we must degrade a bit.</font>
00111 <font class="comment"> NB: if polygonCount==MinFaceUsed, then we have here ld= -NL3D_MRM_LD_SHIFT_POLY_COUNT (ie -0.05f)</font>
00112 <font class="comment"> but it is clamped below</font>
00113 <font class="comment"> */</font>
00114 ld-= <a class="code" href="mrm__level__detail_8h.html#a0">NL3D_MRM_LD_SHIFT_POLY_COUNT</a>;
00115 <a class="code" href="namespaceNLMISC.html#a215">NLMISC::clamp</a>(ld, 0, 1);
00116 }
00117 <font class="keywordflow">else</font>
00118 ld= 1;
00119
00120 <font class="keywordflow">return</font> ld;
00121 }
00122
00123 };
00124
00125
00126 } <font class="comment">// NL3D</font>
00127
00128
00129 <font class="preprocessor">#endif // NL_MRM_LEVEL_DETAIL_H</font>
00130 <font class="preprocessor"></font>
00131 <font class="comment">/* End of mrm_level_detail.h */</font>
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